Rep. Adam Schiff, D-Calif., the chairman of the House Intelligence Committee, said Sunday that he believes there is still “significant evidence of collusion” linking the Russian government with President Trump’s 2016 presidential campaign, despite reports out of the Justice Department that Special Counsel Robert Mueller will not be recommending any further indictments in his investigation.

“There's a difference between compelling evidence of collusion and whether the special counsel concludes that he can prove beyond a reasonable doubt the criminal charge of conspiracy,” Schiff said during an interview on ABC’s “This Week.” “I leave that decision to Bob Mueller, and I have full confidence in him.”

“I trust in his prosecutorial judgment,” Schiff added. “But that doesn't mean, of course, that there isn’t compelling and incriminating evidence that should be shared with the American people.”

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Schiff is one of numerous Democrats pressing for full disclosure of Mueller's report on the Russia investigation and vowing to use subpoena powers and other legal means if necessary to get it.

Attorney General William Barr was expected to release his first summary of Mueller's findings on Sunday, people familiar with the process said, on what lawmakers anticipated could be a day of reckoning in the two-year probe into President Trump and Russian efforts to elect him. Since receiving the report Friday, Barr has been deciding how much of it Congress and the public will see.

At his resort in Florida, Trump stirred from an unusual, nearly two-day silence on Twitter with the tweet Sunday morning: "Good Morning, Have a Great Day!" Then followed up: "MAKE AMERICA GREAT AGAIN!"

An error occurred while retrieving the Tweet. It might have been deleted.

Democratic Rep. Jerrold Nadler, chairman of the House Judiciary Committee, said Democrats won't be willing to wait long for the Justice Department to hand over full information on the probe into whether Trump's 2016 campaign coordinated with Russia to sway the election and whether the president later sought to obstruct the investigation.

"It won't be months," he said on CNN's "State of the Union."

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Asked if he still believes Trump obstructed justice, he indicated there has been obstruction but "whether it's criminal is another question."

Barr and Deputy Attorney General Rod Rosenstein, who appointed Mueller and oversaw much of his work, analyzed the report on Saturday, laboring to condense it into a summary letter of main conclusions.

The Russia investigation has shadowed Trump for nearly two years and has ensnared his family and close advisers. And no matter the findings in Mueller's report, the probe already has illuminated Russia's assault on the American political system, painted the Trump campaign as eager to exploit the release of hacked Democratic emails to hurt Democrat Hillary Clinton and exposed lies by Trump aides aimed at covering up their Russia-related contacts.

Barr has said he wants to release as much as he can under the law. That decision will require him to weigh the Justice Department's longstanding protocol of not releasing negative information about people who aren't indicted against the extraordinary public interest in a criminal investigation into the president and his campaign.

Democrats are citing the department's recent precedent of norm-breaking disclosures, including during the Clinton email investigation, to argue that they're entitled to Mueller's entire report and the underlying evidence he collected.

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Even with the details still under wraps, Friday's end to the 22-month probe without additional indictments by Mueller was welcome news to some in Trump's orbit who had feared a final round of charges could target more Trump associates or members of the president's family.

The White House sought to keep its distance, saying Sunday it had not been briefed on the report. Trump, who has relentlessly criticized Mueller's investigation as a "witch hunt," went golfing Saturday and was uncharacteristically quiet on Twitter. Not so one of his guests, musician Kid Rock, who posted a picture with the president and the tweet, "Another great day on the links!" He added: "What a great man, so down to earth and so fun to be with!!"

The conclusion of Mueller's investigation does not remove legal peril for the president.

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He faces a separate Justice Department investigation in New York into hush money payments during the campaign to two women who say they had sex with him years before the election. He's also been implicated in a potential campaign finance violation by his former lawyer, Michael Cohen, who says Trump asked him to arrange the transactions. Federal prosecutors, also in New York, have been investigating foreign contributions made to the president's inaugural committee.

As for Mueller, absent the report's details, it was not known whether he concluded the campaign colluded with the Kremlin to tip the election in favor of the celebrity businessman. A Justice Department official did confirm that Mueller was not recommending any further indictments, meaning the investigation had ended without any public charges of a criminal conspiracy, or of obstruction of justice by the president.

In a letter to the Republican and Democratic leaders of the congressional judiciary committees, Barr noted on Friday that the department had not denied any request from Mueller, something Barr would have been required to disclose to ensure there was no political interference. Trump was never interviewed in person by Mueller's team, but submitted answers to questions in writing.

The Associated Press contributed to this report.